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The Research of Fault Location in Power Network by Traveling Wave

Author: LiuZhengYi
Tutor: TanShunTaoï¼›ZengXiangJun
School: Wuhan University
Course: Proceedings of the
Keywords: Fault location Traveling wave Sensor GPS
CLC: TM762.25
Type: Master's thesis
Year: 2004
Downloads: 285
Quote: 3
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Abstract


Power system operation and long-standing problem , the high-voltage transmission network fault location is accurate fault location network can greatly shorten the time of the patrol line , to speed up the restoration of electricity , has a very important significance for safe and economic operation of the power system . Firstly Travelling wave fault location comprehensive overview . Fault location for at home and abroad using the traveling wave method , you need to have a high-speed data acquisition system for mass data storage , or needs to be changed once the system wiring . In this paper, specially developed traveling wave sensor to extract the traveling wave signals , to avoid the high-speed data acquisition and change system wiring . GPS-based precision clock synchronization method of transmission network fault location . First traveling wave transmission theory , drawing on the theory of the transformer wave process , the establishment of a the transformer distributed parameter model and the use of the EMTP simulation software simulation model . Experiments to test the nature of the mass change of the transformer , voltage transformer and current transformer can be obtained accurate real-time transmission line wave polarity conclusion . The extraction of the first wave of the fault line is critical of the the grid fault location system . In this paper, specially developed through the core of the traveling wave and the partial pressure of traveling wave sensor to extract the electric pop wave signal and voltage traveling wave signal using the complementary features of the high - precision crystal oscillator and the GPS clock accuracy , developed a high-precision synchronous clock device . To achieve line Bobo head to reach the the of the precise records of the moment . The article describes the the entire fault location system structure , system , field experiments , the experimental results show that the positioning error of less than 300m , with high positioning accuracy . And to the actual and practical of the engineering carried out a description is , analysis of a the the characteristics of of the Zhuzhou power grid structure , put forward the positioning of the program of the fault , and and In this regard the program carried out a simulation analysis of . Grid , grid -based traveling wave fault location system failure can be accurately positioned . The system has a strong theoretical value and practical significance , has a very important role in improving the safe and stable operation of the grid . And provides a theoretical basis for the future development of the network protection .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation > Automatic control of electrical equipment > Automatic reclosing > Test adjustment and maintenance
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